dzhokhar tsarnaev was arraigned this morning, at boston's beth israel deaconess hospital, where he remained in serious condition. a short time later came word of the complaint, filed by the u.s. justice department. it formally charged the 19-year- old with conspiring to use a weapon of mass destruction, potentially, a capital crime, punishable by the death penalty. and, destruction of property by explosive device, causing death. tsarnaev had been able, sporadically, to answer questions in writing, but a gunshot wound to the neck left him unable to speak. it was unclear if he was read his miranda rights. but in washington, white house spokesman jay carney said he's a naturalized u.s. citizen, so he will not face a military tribunal. >> he will not be treated as an enemy combatant. we will prosecute this terrorist through our civilian system of justice, under us law. u.s. citizen can not be trialed, tried rather in military commissions. and it's important to remember that since 9-11 we have used the federal court system to convict and incarcerate hundreds of terrorists. >> brown: tsarnaev was